Many sedimentary rocks contain such features as ripple marks, exactly like those we can see forming in sediments at the bottomof present-day lakes or shallow seas.
我们可以看到，现在的湖底或浅海底部的沉积物中形成了波痕。许多沉积岩都含有类似这种波痕的特征。
2
Buffer extended the compressed air cooling and steam condensation of time, buffer automatic drainage function to avoid the liquid water in the bottomof the container sedimentary likely.
缓冲器延长了压缩空气冷却以及蒸气冷凝的时间，缓冲器的自动排水功能避免了液态水沉积在容器底部的可能。
3
The idea on low strength request (relative to the strength of the pile shaft) to grouted body in sedimentary region at the pile bottom is clarified.